374 lines
8.5 KiB
C++
374 lines
8.5 KiB
C++
/*
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* Copyright © 2011 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef OPTIONS_HH
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#define OPTIONS_HH
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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#include <locale.h>
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#include <errno.h>
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#include <fcntl.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h> /* for isatty() */
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#endif
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#ifdef HAVE_IO_H
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#include <io.h> /* for _setmode() under Windows */
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#endif
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#include <hb.h>
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#ifdef HAVE_OT
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#include <hb-ot.h>
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#endif
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#include <glib.h>
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#include <glib/gprintf.h>
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#undef MIN
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template <typename Type> static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
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#undef MAX
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template <typename Type> static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
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void fail (hb_bool_t suggest_help, const char *format, ...) G_GNUC_NORETURN;
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extern hb_bool_t debug;
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struct option_group_t
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{
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virtual void add_options (struct option_parser_t *parser) = 0;
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virtual void pre_parse (GError **error G_GNUC_UNUSED) {};
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virtual void post_parse (GError **error G_GNUC_UNUSED) {};
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};
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struct option_parser_t
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{
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option_parser_t (const char *usage) {
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memset (this, 0, sizeof (*this));
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usage_str = usage;
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context = g_option_context_new (usage);
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add_main_options ();
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}
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~option_parser_t (void) {
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g_option_context_free (context);
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}
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void add_main_options (void);
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void add_group (GOptionEntry *entries,
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const gchar *name,
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const gchar *description,
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const gchar *help_description,
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option_group_t *option_group);
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void parse (int *argc, char ***argv);
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G_GNUC_NORETURN void usage (void) {
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g_printerr ("Usage: %s [OPTION...] %s\n", g_get_prgname (), usage_str);
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exit (1);
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}
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const char *usage_str;
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GOptionContext *context;
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};
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#define DEFAULT_MARGIN 16
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#define DEFAULT_FORE "#000000"
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#define DEFAULT_BACK "#FFFFFF"
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#define DEFAULT_FONT_SIZE 256
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struct view_options_t : option_group_t
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{
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view_options_t (option_parser_t *parser) {
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annotate = false;
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fore = DEFAULT_FORE;
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back = DEFAULT_BACK;
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line_space = 0;
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margin.t = margin.r = margin.b = margin.l = DEFAULT_MARGIN;
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font_size = DEFAULT_FONT_SIZE;
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add_options (parser);
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}
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void add_options (option_parser_t *parser);
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hb_bool_t annotate;
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const char *fore;
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const char *back;
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double line_space;
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struct margin_t {
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double t, r, b, l;
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} margin;
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double font_size;
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};
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struct shape_options_t : option_group_t
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{
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shape_options_t (option_parser_t *parser)
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{
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direction = language = script = NULL;
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features = NULL;
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num_features = 0;
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shapers = NULL;
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utf8_clusters = false;
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normalize_glyphs = false;
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add_options (parser);
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}
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~shape_options_t (void)
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{
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free (features);
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g_free (shapers);
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}
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void add_options (option_parser_t *parser);
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void setup_buffer (hb_buffer_t *buffer)
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{
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hb_buffer_set_direction (buffer, hb_direction_from_string (direction, -1));
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hb_buffer_set_script (buffer, hb_script_from_string (script, -1));
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hb_buffer_set_language (buffer, hb_language_from_string (language, -1));
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}
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void populate_buffer (hb_buffer_t *buffer, const char *text, int text_len)
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{
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hb_buffer_reset (buffer);
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hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
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if (!utf8_clusters) {
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/* Reset cluster values to refer to Unicode character index
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* instead of UTF-8 index. */
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unsigned int num_glyphs = hb_buffer_get_length (buffer);
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
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for (unsigned int i = 0; i < num_glyphs; i++)
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{
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info->cluster = i;
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info++;
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}
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}
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setup_buffer (buffer);
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}
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hb_bool_t shape (hb_font_t *font, hb_buffer_t *buffer)
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{
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hb_bool_t res = hb_shape_full (font, buffer, features, num_features, shapers);
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if (normalize_glyphs)
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hb_buffer_normalize_glyphs (buffer);
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return res;
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}
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void shape_closure (const char *text, int text_len,
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hb_font_t *font, hb_buffer_t *buffer,
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hb_set_t *glyphs)
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{
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hb_buffer_reset (buffer);
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hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
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setup_buffer (buffer);
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hb_ot_shape_glyphs_closure (font, buffer, features, num_features, glyphs);
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}
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const char *direction;
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const char *language;
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const char *script;
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hb_feature_t *features;
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unsigned int num_features;
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char **shapers;
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hb_bool_t utf8_clusters;
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hb_bool_t normalize_glyphs;
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};
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struct font_options_t : option_group_t
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{
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font_options_t (option_parser_t *parser) {
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font_file = NULL;
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face_index = 0;
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font = NULL;
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add_options (parser);
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}
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~font_options_t (void) {
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hb_font_destroy (font);
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}
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void add_options (option_parser_t *parser);
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hb_font_t *get_font (void) const;
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const char *font_file;
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int face_index;
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private:
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mutable hb_font_t *font;
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};
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struct text_options_t : option_group_t
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{
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text_options_t (option_parser_t *parser) {
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text = NULL;
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text_file = NULL;
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fp = NULL;
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gs = NULL;
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text_len = (unsigned int) -1;
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add_options (parser);
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}
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~text_options_t (void) {
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if (gs)
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g_string_free (gs, true);
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if (fp)
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fclose (fp);
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}
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void add_options (option_parser_t *parser);
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void post_parse (GError **error G_GNUC_UNUSED) {
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if (text && text_file)
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g_set_error (error,
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G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
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"Only one of text and text-file can be set");
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};
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const char *get_line (unsigned int *len);
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const char *text;
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const char *text_file;
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private:
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FILE *fp;
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GString *gs;
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unsigned int text_len;
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};
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struct output_options_t : option_group_t
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{
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output_options_t (option_parser_t *parser) {
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output_file = NULL;
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output_format = NULL;
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fp = NULL;
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add_options (parser);
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}
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~output_options_t (void) {
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if (fp)
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fclose (fp);
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}
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void add_options (option_parser_t *parser);
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void post_parse (GError **error G_GNUC_UNUSED)
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{
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if (output_file && !output_format) {
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output_format = strrchr (output_file, '.');
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if (output_format)
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output_format++; /* skip the dot */
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}
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if (output_file && 0 == strcmp (output_file, "-"))
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output_file = NULL; /* STDOUT */
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}
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FILE *get_file_handle (void);
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const char *output_file;
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const char *output_format;
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mutable FILE *fp;
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};
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struct format_options_t : option_group_t
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{
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format_options_t (option_parser_t *parser) {
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show_glyph_names = true;
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show_positions = true;
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show_clusters = true;
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show_text = false;
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show_unicode = false;
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show_line_num = false;
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add_options (parser);
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}
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void add_options (option_parser_t *parser);
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void serialize_unicode (hb_buffer_t *buffer,
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GString *gs);
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void serialize_glyphs (hb_buffer_t *buffer,
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hb_font_t *font,
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hb_bool_t utf8_clusters,
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GString *gs);
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void serialize_line_no (unsigned int line_no,
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GString *gs);
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void serialize_buffer_of_text (hb_buffer_t *buffer,
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unsigned int line_no,
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const char *text,
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unsigned int text_len,
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hb_font_t *font,
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hb_bool_t utf8_clusters,
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GString *gs);
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void serialize_message (unsigned int line_no,
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const char *msg,
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GString *gs);
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void serialize_buffer_of_glyphs (hb_buffer_t *buffer,
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unsigned int line_no,
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const char *text,
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unsigned int text_len,
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hb_font_t *font,
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hb_bool_t utf8_clusters,
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GString *gs);
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hb_bool_t show_glyph_names;
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hb_bool_t show_positions;
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hb_bool_t show_clusters;
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hb_bool_t show_text;
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hb_bool_t show_unicode;
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hb_bool_t show_line_num;
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};
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#endif
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